Sensor-based systems for the measurement of Functional Reach Test results: a systematic review.

The measurement of Functional Reach Test (FRT) is a widely used assessment tool in various fields, including physical therapy, rehabilitation, and geriatrics. This test evaluates a person's balance, mobility, and functional ability to reach forward while maintaining stability. Recently, there has been a growing interest in utilizing sensor-based systems to objectively and accurately measure FRT results. This systematic review was performed in various scientific databases or publishers, including PubMed Central, IEEE Explore, Elsevier, Springer, the Multidisciplinary Digital Publishing Institute (MDPI), and the Association for Computing Machinery (ACM), and considered studies published between January 2017 and October 2022, related to methods for the automation of the measurement of the Functional Reach Test variables and results with sensors. Camera-based devices and motion-based sensors are used for Functional Reach Tests, with statistical models extracting meaningful information. Sensor-based systems offer several advantages over traditional manual measurement techniques, as they can provide objective and precise measurements of the reach distance, quantify postural sway, and capture additional parameters related to the movement.

Enzymes Involved in Antioxidant and Detoxification Processes Present Changes in the Expression Levels of Their Coding Genes under the Stress Caused by the Presence of Antimony in Tomato.

Currently, there is an increasing presence of heavy metals and metalloids in soils and water due to anthropogenic activities. However, the biggest problem caused by this increase is the difficulty in recycling these elements and their high permanence in soils. There are plants with great capacity to assimilate these elements or make them less accessible to other organisms. We analyzed the behavior of Solanum lycopersicum L., a crop with great agronomic interest, under the stress caused by antimony (Sb). We evaluated the antioxidant response throughout different exposure times to the metalloid. Our results showed that the enzymes involved in the AsA-GSH cycle show changes in their expression level under the stress caused by Sb but could not find a relationship between the NITROSOGLUTATHIONE REDUCTASE (GSNOR) expression data and nitric oxide (NO) content in tomato roots exposed to Sb. We hypothesize that a better understanding of how these enzymes work could be key to develop more tolerant varieties to this kind of abiotic stress and could explain a greater or lesser phytoremediation capacity. Moreover, we deepened our knowledge about Glutathione S-transferase (GST) and Glutathione Reductase (GR) due to their involvement in the elimination of the xenobiotic component.

Mobile Data Gathering and Preliminary Analysis for the Functional Reach Test.

The functional reach test (FRT) is a clinical tool used to evaluate dynamic balance and fall risk in older adults and those with certain neurological diseases. It provides crucial information for developing rehabilitation programs to improve balance and reduce fall risk. This paper aims to describe a new tool to gather and analyze the data from inertial sensors to allow automation and increased reliability in the future by removing practitioner bias and facilitating the FRT procedure. A new tool for gathering and analyzing data from inertial sensors has been developed to remove practitioner bias and streamline the FRT procedure. The study involved 54 senior citizens using smartphones with sensors to execute FRT. The methods included using a mobile app to gather data, using sensor-fusion algorithms like the Madgwick algorithm to estimate orientation, and attempting to estimate location by twice integrating accelerometer data. However, accurate position estimation was difficult, highlighting the need for more research and development. The study highlights the benefits and drawbacks of automated balance assessment testing with mobile device sensors, highlighting the potential of technology to enhance conventional health evaluations.

Designing a Tangible User Interface (TUI) for the Elderly Based on Their Motivations and Game Elements.

The elderly population has grown significantly in recent years, requiring strategies focused on promoting active aging to improve health and well-being. It may be achieved in many ways, including using technology for this population. We propose an interactive system for older adults based on a tangible user interface. A group of 10 experts conducted a heuristic evaluation of a system of this type utilizing a questionnaire and obtaining satisfactory results. This study evaluated the older adult population's fun and pervasive game experience. The results will provide a basis for continuing to build this interactive system to promote active aging in older adults, either at the cognitive or physical level, depending on the applied approach.

Subjective behavioral measures in myopic and pre-myopic children before and after the COVID lockdown.

Background: There are environmental factors that may contribute to the onset of myopia. This study aims to evaluate the children's lifestyle changes before and after the COVID-19 lockdown and how they can influence their vision. Methods: The same questionnaire was administered to children aged between 5 and 7 in Spain every year in September before (2017-2019) and after the COVID-19 lockdown (2020-2021). All the children also passed a vision exam consisting of the measurement of visual acuity (VA) and determination of objective and subjective refraction. Children were classified as myopes, pre-myopes, or hyperopes. The cut-off points to define the refractive error were established according to the value of the spherical equivalent (SE): hyperopia (SE > +0,75D), myopia (SE ≤ -0,5D), or pre-myopia (-0.5D < SE ≥ +0.75D). Data analysis is performed with the SPSS 27.0 software (SPSS Inc., Chicago, Illinois). Results: In the pre-COVID period, the pre-myopes were the ones who spent the longest time outdoors, and after the COVID lockdown, there were no differences between groups. There neither were any differences in the time spent doing near-work activities between the groups in both periods (p > 0.05). Regarding the spherical equivalent, in the pre-COVID period, the mean value was 0.75 ± 2.09D and after the COVID lockdown, it was 0.47 ± 1.88D (p < 0.001). Conclusion: Pre-myopes spent more time outdoors than myopes in the pre-COVID period, while myopes spent more time using digital devices. All these differences do not exist after the COVID lockdown, with a general increase in the time spent outdoors and a decrease in the use of digital devices. Further studies are needed to know if these lifestyle changes remain and how they influence the onset of myopia.

Middle Meningeal Artery Embolization versus Surgery in Patients with Chronic Subdural Hematoma-No More Fence Sitting?

BACKGROUND: Endovascular treatment of patients with chronic subdural hematoma using middle meningeal artery (MMA) embolization could become an alternative to surgical hematoma evacuation. The aim of the study was to compare methods and identify parameters to help determine the correct treatment modality. METHODS: We retrospectively reviewed 142 cases conducted internally; 78 were treated surgically and 64 were treated using MMA embolization. We analyzed the treatment failure rate and complications, and using a binary logistic regression model, we identified treatment failure risk factors. RESULTS: We found a comparable treatment failure rate of 23.1% for the surgery group and 21.9% for the MMA embolization group. However, in the MMA embolization group, 11 cases showed treatment failure due to early neurological worsening with a need for concomitant surgery. We also found a recurrence of hematoma in 15.4% of cases in the surgery group and 6.3% of cases in the MMA embolization group. CONCLUSION: Both modalities have their advantages; however, correct identification is crucial for treatment success. According to our findings, hematomas with a maximal width of <18 mm, a midline shift of <5 mm, and no acute or subacute (hyperdense) hematoma could be treated with MMA embolization. Hematomas with a maximal width of >18 mm, a midline shift of >5 mm, and no membranous segmentation could have better outcomes after surgical treatment.

Meaningful learning: motivations of older adults in serious games.

Social sustainability is the generation of significant behaviors through balanced levels of education, learning and awareness so that the population has a good standard of living, achieves self-improvement and supports society. This can be achieved with various strategies, one of which is learning through games, which has gained popularity in recent years due to positive results. This is effectively achieved through serious gaming, which is growing steadily, mostly in education and healthcare. This type of strategy has been typically used in young populations with a transparent interaction with technological processes that facilitate its application. However, one cannot neglect other populations such as the elderly, who may experience a technology gap and may not perceive this type of initiative in the best light. The purpose of this article is to identify the different motivations that can encourage older adults to use serious games to encourage learning processes through technology. For this purpose, different previous research on gaming experiences with older adults has been identified, from which it was possible to categorize a series of factors that motivate this population. Subsequently, we represented these factors by means of a model of motivation for the elderly and, to be able to use it, we have defined a set of heuristics based on this model. Finally, we used the heuristics by means of a questionnaire to evaluate the design of serious gaming for older adults, obtaining positive results for the use of these elements to guide the design and construction of serious games for learning in older adults.

Equity throughout the life course and the evolving role of the Pan American Health Organization.

The objective of this article is to summarize the evolution of the regional commitments of the Pan American Health Organization (PAHO) on health promotion and strategies to improve the health and well-being of women, children, adolescents, and older persons. PAHO regional strategies approved by Member States in the last 20 years are used as the main source of information. The article presents the challenges of making health promotion a public health strategy widely applied in the Region of the Americas and the efforts to renew Member States' collective actions. The article also describes current PAHO efforts to include the positive aspects of health (i.e., well-being, optimal development, and functional ability) and the life course approach as opportunities to advance equity. The article reflects on immunization as a public good and the urgency to address the current challenges as a core element of the regional efforts to transform health systems after more than two years of the COVID-19 pandemic.

El objetivo de este artículo es resumir la evolución de los compromisos regionales de la Organización Panamericana de la Salud (OPS) en materia de promoción de la salud y estrategias para mejorar la salud y el bienestar de mujeres, niños y niñas, adolescentes y personas mayores. Se han empleado como principal fuente de información las estrategias regionales de la OPS aprobadas por los Estados Miembros en los últimos 20 años. En el artículo se presentan los desafíos de convertir la promoción de la salud en una estrategia de salud pública de amplia ejecución en la Región de las Américas y los esfuerzos para renovar las medidas colectivas de los Estados Miembros. Asimismo, se describe la labor actual de la OPS para incluir los aspectos positivos de la salud (como el bienestar, el desarrollo óptimo y la capacidad funcional) y el enfoque del curso de vida como oportunidades para fomentar la equidad. Finalmente, se reflexiona sobre la inmunización como bien público y la urgencia de abordar los desafíos actuales como elemento central de los esfuerzos regionales para transformar los sistemas de salud tras más de dos años de pandemia de COVID-19.

O objetivo deste artigo é resumir a evolução dos compromissos regionais da Organização Pan-Americana da Saúde (OPAS) relativos à promoção da saúde e estratégias para melhorar a saúde e o bem-estar de mulheres, crianças, adolescentes e pessoas idosas. As estratégias regionais da OPAS aprovadas pelos Estados Membros nos últimos 20 anos são a principal fonte de informação. O artigo apresenta os desafios enfrentados para fazer da promoção da saúde uma estratégia de saúde pública amplamente aplicada na Região das Américas e os esforços para renovar as ações coletivas dos Estados Membros. O artigo também descreve os atuais esforços da OPAS para incluir os aspectos positivos da saúde (isto é, bem-estar, desenvolvimento ideal e habilidade funcional) e a abordagem de curso da vida como oportunidades para promover a equidade. O artigo faz reflexões sobre a imunização como um bem público e a urgência de abordar os desafios atuais como um elemento central dos esforços regionais para transformar os sistemas de saúde após mais de dois anos da pandemia de COVID-19.

Systematic review and meta-analysis: Transient elastography compared to liver biopsy for staging of liver fibrosis in primary biliary cholangitis.

INTRODUCTION AND OBJECTIVES: Primary biliary cholangitis (PBC) is an autoimmune liver disease, with 60% of patients being asymptomatic at diagnosis and 30% progressing rapidly into liver fibrosis. Liver biopsy is standard for staging fibrosis, but performance of non-invasive methods such as transient elastography (TE) have not been evaluated. We conducted a meta-analysis of articles up to May 2022 to evaluate the performance of TE compared with liver biopsy in adult patients with PBC. MATERIALS AND METHODS: Two reviewers performed the search and assessed which articles were included. The quality of each study was evaluated according to QUADAS-2 and NOS. Meta-analysis of sensitivity and specificity was conducted with a bivariate random-effects model. The protocol was registered in PROSPERO, ID CRD42020199915. RESULTS: Four studies involving 377 patients were included. Only stages F3 and F4 were computed in the meta-analysis. TE had a pooled sensitivity of 68% and specificity of 92% for stage F3 and a pooled sensitivity of 90% and specificity of 94% for stage F4. The AUROC curves were 0.91 (95% Confidence Interval (CI) 0.88-0.93) and 0.97 (95% CI 0.96-0.98) for stages F3 and F4, respectively. The mean cut-off points of TE for stage F3 were 9.28 kPa (95% CI 4.98-13.57) and for stage F4 were 15.2 kPa (95% CI 7.02-23.37). CONCLUSIONS: TE performance compared with liver biopsy in adult patients with PBC was excellent for staging liver fibrosis and was able to rule out cirrhosis in clinical practice.

Half of the patients with subepithelial tumors present borderline or pathologic anxiety-distress and carcinophobia: a multicenter cohort study.

BACKGROUND AND AIMS: Minor nonspecific gastrointestinal subepithelial lesions (usually defined by the term 'tumor') are usually associated with a malignant illness and cancer. The aim of this study was to assess anxiety-distress and carcinophobia in patients referred to specialized monographic outpatient clinics for evaluation and treatment of this type of lesion. METHODS: Prospective, multicenter, cohort study. Specific self-reported questionnaires were used to report threatening life-experiences and to assess levels of distress (The Hospital Anxiety and Depression Scale) and cancer-related worries (The Cancer Worry Scale). RESULTS: Forty participants were included and analyzed at baseline. Pathologic and borderline anxiety were detected in 13% (5/40, 95%CI: 4-27%) and 35% (14/40, 95%CI: 21-52%) of participants, respectively, whereas, cancer-related worries (moderate to very high) were observed in 48% (19/40, 95%CI: 32-64%) of participants. Pathologic global distress was identified in 25% (10/40, 95%CI: 13-42%) of subjects. Higher educational level (university studies), a lack of lifetime psychiatric comorbidity and a lack of family history of cancer were associated with less anxiety, global distress and carcinophobia. CONCLUSIONS: Almost half of the patients diagnosed with a minor nonspecific gastrointestinal subepithelial lesion presented anxiety-distress and/or carcinophobia. Specific associations with anxiety-distress reaction and fears were detected.

Predicting severe maternal outcomes in a network of sentinel sites in Latin-American countries.

OBJECTIVE: This study aimed to determine incidences of potentially life-threatening conditions (PLTC), maternal near misses (MNM), and maternal deaths (MD) in women who gave birth in participating facilities, and to determine the probability that a pregnancy involving a PLTC would evolve into an MNM and/or an MD. METHODS: This was a multicentric observational study implemented on a maternal network from August 2018 to May 2019 in five Latin-American countries. We summarized categorical variables as frequencies and continuous variables with median, interquartile range, and standard deviations. Positive and negative likelihood ratios were calculated and multivariate predictive models were built. RESULTS: There were 33 901 deliveries and miscarriages, of which 8.0% had at least one PLTC and 0.6% had an MNM. Hypertensive disorder was the most frequent condition to evolve into a severe maternal outcome. CONCLUSION: Identifying PLTC can help to prevent MNM and MD. The inclusion of these predictors in a real-time data registration system like the Perinatal Informatic System could work as a surveillance tool for early detection, leading to a reduction in the rate of worsening conditions.

Equity throughout the life course and the evolving role of the Pan American Health Organization / Equidad a lo largo del curso de vida y la evolución del papel de la Organización Panamericana de la Salud / Equidade ao longo da vida e a evolução do papel da Organização Pan-Americana da Saúde

ABSTRACT The objective of this article is to summarize the evolution of the regional commitments of the Pan American Health Organization (PAHO) on health promotion and strategies to improve the health and well-being of women, children, adolescents, and older persons. PAHO regional strategies approved by Member States in the last 20 years are used as the main source of information. The article presents the challenges of making health promotion a public health strategy widely applied in the Region of the Americas and the efforts to renew Member States' collective actions. The article also describes current PAHO efforts to include the positive aspects of health (i.e., well-being, optimal development, and functional ability) and the life course approach as opportunities to advance equity. The article reflects on immunization as a public good and the urgency to address the current challenges as a core element of the regional efforts to transform health systems after more than two years of the COVID-19 pandemic.

RESUMEN El objetivo de este artículo es resumir la evolución de los compromisos regionales de la Organización Panamericana de la Salud (OPS) en materia de promoción de la salud y estrategias para mejorar la salud y el bienestar de mujeres, niños y niñas, adolescentes y personas mayores. Se han empleado como principal fuente de información las estrategias regionales de la OPS aprobadas por los Estados Miembros en los últimos 20 años. En el artículo se presentan los desafíos de convertir la promoción de la salud en una estrategia de salud pública de amplia ejecución en la Región de las Américas y los esfuerzos para renovar las medidas colectivas de los Estados Miembros. Asimismo, se describe la labor actual de la OPS para incluir los aspectos positivos de la salud (como el bienestar, el desarrollo óptimo y la capacidad funcional) y el enfoque del curso de vida como oportunidades para fomentar la equidad. Finalmente, se reflexiona sobre la inmunización como bien público y la urgencia de abordar los desafíos actuales como elemento central de los esfuerzos regionales para transformar los sistemas de salud tras más de dos años de pandemia de COVID-19.

RESUMO O objetivo deste artigo é resumir a evolução dos compromissos regionais da Organização Pan-Americana da Saúde (OPAS) relativos à promoção da saúde e estratégias para melhorar a saúde e o bem-estar de mulheres, crianças, adolescentes e pessoas idosas. As estratégias regionais da OPAS aprovadas pelos Estados Membros nos últimos 20 anos são a principal fonte de informação. O artigo apresenta os desafios enfrentados para fazer da promoção da saúde uma estratégia de saúde pública amplamente aplicada na Região das Américas e os esforços para renovar as ações coletivas dos Estados Membros. O artigo também descreve os atuais esforços da OPAS para incluir os aspectos positivos da saúde (isto é, bem-estar, desenvolvimento ideal e habilidade funcional) e a abordagem de curso da vida como oportunidades para promover a equidade. O artigo faz reflexões sobre a imunização como um bem público e a urgência de abordar os desafios atuais como um elemento central dos esforços regionais para transformar os sistemas de saúde após mais de dois anos da pandemia de COVID-19.

Building a network of sentinel centres for the care of women in an abortion situation: advances in Latin America and the Caribbean.

Previous reports have already estimated the overall number of abortions and the number of unsafe abortions in Latin America. Conversely, there are few reliable data from this region to inform public policies aiming to meet women's needs. In this context, the Latin American Centre of Perinatology (Centro Latinoamericano de Perinatología (CLAP)) created a network specialising in the care of women in an abortion situation (CLAP MUSA-Network) in an attempt to strengthen healthcare surveillance in Latin America by using the Perinatal Information System (Sistema Informático Perinatal (SIP)). This system was developed by the CLAP with a special module named SIP Abortion (SIP-A), a data collection tool designed by Latin American experts to be routinely used in cases of legal and incomplete abortions. The SIP-A follows the standards established by WHO, allowing investigators to systematise information, generate local reports and monitor changes after training and follow-up interventions based on national guidelines. This network promotes collaborative work between institutions to strengthen epidemiological surveillance, cooperative investigation and development of a critical mass of professionals skilled in sexual and reproductive health. Currently, 29 sentinel centres from 13 countries jointly work exchanging information to improve surveillance of healthcare indicators of women in an abortion situation. Latin America was the first region in the world to have a network of sentinel centres that continuously monitors healthcare provision to these women. Data collected by this network are already being used to design, implement and evaluate public policies.

Changes in the Choroidal Thickness of Children Wearing MiSight to Control Myopia.

Background: Due to the importance of choroidal thickness in the development of myopia, this study examined the effect of MiSight contact lenses (CLs) on the choroidal thickness of myopic children and the differences between responders and non-responders to the treatment with these CLs. Methods: A total of 41 myopic children were fitted with MiSight CLs and 33 with single-vision spectacles. They were followed up for two years. Subfoveal choroidal thickness and choroidal thickness 1 and 3 mm temporal and nasal to the fovea were measured by OCT at baseline and one and two years after the treatment. Differences in all the choroidal thickness parameters were assessed in each group over time. Patients from the MiSight group were classified based on a specific range of changes in axial length at the end of the second year of treatment as "responders" (AL change < 0.22 mm/per year) and "non-responders", and the choroidal thickness of both groups was analyzed. Results: The subfoveal choroidal thickness of the MiSight and single-vision spectacle groups did not show any changes over time. Wearing MiSight CLs induced relative choroidal thickening in the responder group in the first year of treatment. Conclusion: Choroidal thickness might work as a predictor of the effectiveness of MiSight in myopia treatment.

Cesarean section in Uruguay from 2008 to 2018: country analysis based on the Robson classification. An observational study.

BACKGROUND: The use of caesarean section has steadily increased, with Latin America being the region with the highest rates. Multiple factors account for that increase and the Robson classification is appropriate to compare determinants at the clinical level for caesarean section rates over time. The purpose of this study is to describe the evolution of caesarean section rates by Robson groups in Uruguay from 2008 to 2018 using a country level database. METHODS: We included the records of all women giving birth in Uruguay (pregnancies ≥22 weeks and weights ≥500 g) with valid data in the mode of childbirth recorded in the Perinatal Information System database between 2008 and 2018. Caesarean section rates were calculated by Robson groups for each of the years included, disaggregated by care sector (public/private) and by geographical area (Capital City/Non-Capital), with time trends and their significance analyzed using linear regression models. RESULTS: Of the total 485,263 births included in this research, the overall caesarean section rate was 43,1%. In 2018, among the groups at lower risk of caesarean section (1 to 4), the highest rates were seen in women in group 2B (98,8%), followed by those in group 4B (97,9%). A significant increase in the number of caesarean sections was seen in groups 2B (97,9 to 98,8%), 3 (8,36 to 11,1%) and 4 (A (22,7 to 26,9%) and B (95,4 to 97,9%) Significant growth was also observed in groups 5 (74,3 to 78,1%), 8 (90,6 to 95,5%), and 10 (39,1 to 46,7%). The private sector had higher rates of caesarean section for all groups throughout the period, except for women in group 9. The private sector in Montevideo presented the highest rates in the groups with the lowest risk of caesarean section (1, 2A, 3 and 4A), followed by the private sector outside of the capital. CONCLUSION: Uruguay is no exception to the increasing caesarean section trend, even in groups of women who have lower risk of requiring caesarean section. The implementation of interventions aimed at reducing caesarean section in the groups with lower obstetric risk in Uruguay is warranted.

Maternal mortality linked to COVID-19 in Latin America: Results from a multi-country collaborative database of 447 deaths.

Background: This study aimed to describe the clinical characteristics of maternal deaths associated with COVID-19 registered in a collaborative Latin-American multi-country database. Methods: This was an observational study implemented from March 1st 2020 to November 29th 2021 in eight Latin American countries. Information was based on the Perinatal Information System from the Latin American Center for Perinatology, Women and Reproductive Health. We summarized categorical variables as frequencies and percentages and continuous variables into median with interquartile ranges. Findings: We identified a total of 447 deaths. The median maternal age was 31 years. 86·4% of women were infected antepartum, with most of the cases (60·3%) detected in the third trimester of pregnancy. The most frequent symptoms at first consultation and admission were dyspnea (73·0%), fever (69·0%), and cough (59·0%). Organ dysfunction was reported in 90·4% of women during admission. A total of 64·8% women were admitted to critical care for a median length of eight days. In most cases, the death occurred during the puerperium, with a median of seven days between delivery and death. Preterm delivery was the most common perinatal complication (76·9%) and 59·9% were low birth weight. Interpretation: This study describes the characteristics of maternal deaths in a comprehensive multi-country database in Latin America during the COVID-19 pandemic. Barriers faced by Latin American pregnant women to access intensive care services when required were also revealed. Decision-makers should strengthen severity awareness, and referral strategies to avoid potential delays. Funding: Latin American Center for Perinatology, Women and Reproductive Health.

Antecedentes: Este estudio tuvo el objetivo de describir las características clínicas de las muertes maternas asociadas a COVID-19 registradas en una base de datos latinoamericana multipaís. Métodos: Se implementó un estudio observacional descriptivo en el que participaron ochos países Latinoamericanos desde el 1ero de marzo 2020 al 29 de noviembre 2021. La información se obtuvo del Sistema Informático Perinatal del Centro Latino Americano de Perinatología, Salud de la Mujer y Reproductiva. Presentamos las variables categóricas como frecuencias y porcentajes y las variables continuas en medianas con rangos inter cuartiles. Resultados: Identificamos un total de 447 muertes. La mediana de edad materna fue de 31 años. 86·4% de las mujeres se infectaron ante del parto, siendo la mayoría de los casos detectados en el tercer trimestre del embarazo (60·3%). Los síntomas más frecuentes en la primera consulta y la admisión fueron disnea (73·0%), fiebre (69·0%), y tos (59·0%). Se reportaron disfunciones orgánicas en 90·4% de las mujeres durante la admisión. Un total de 64·8% de las mujeres fueron ingresadas a cuidados críticos por una mediana de ocho días de estadía. En la mayoría de los casos la muerte ocurrió durante el puerperio, con una media de siete días entre el parto y su ocurrencia. El parto prematuro fue la complicación perinatal más frecuente (76·9%) y 59·9% tuvo bajo peso al nacer. Interpretación: Este estudio describe las características de las muertes maternas durante la pandemia por COVID-19 a partir de una base colaborativa multipaís. Se observaron barreras para el acceso a cuidados intensivos. Los tomadores de decisión deberían trabajar en el fortalecimiento de la conciencia de gravedad, y en estrategias de referencia para evitar potenciales demoras. Financiamiento: Centro Latino Americano de Perinatología, Salud de la Mujer y Reproductiva.

Superplastic Deformation of Alumina Composites Reinforced with Carbon Nanofibers and with Graphene Oxide Sintered by SPS-Experimental Testing and Theoretical Interpretation.

The superplastic behavior of alumina-based nanostructured ceramics (Al2O3) is an important issue in the world of materials. The main body of this paper is an analysis of the creep behavior of polycrystals, with grain boundary sliding as the main deformation mechanism at high temperatures. Concomitant accommodation of grain shapes to preserve spatial continuity has a comparatively small effect on the strain rate. The constitutive equations for small deformations, relating strain and strain rate, derived from two models for grain sliding, are compared with the experimental data with their respective uncertainties. The data follow from experiments on the plastic deformation of alumina composites reinforced, on the one hand by graphene oxide, and on the other hand by carbon nanofibers sintered by SPS. The results show good agreement between experiment and theory for these advanced ceramics, particularly for one of the assumed models. The values obtained of ξ2 for model A were in the interval 0.0002-0.1189, and for model B were in the interval 0.000001-0.0561. The values obtained of R2 for model A were in the interval 0.9122-0.9994, and for model B were in the interval 0.9586-0.9999. The threshold stress was between (3.05 · 10-15-25.68) MPa.

Prevalence by health areas of chronic kidney disease in the diabetic population of Extremadura in 2012, 2013 and 2014. An observational study.

BACKGROUND AND OBJECTIVE: Diabetes mellitus is the leading cause of chronic kidney disease (CKD) in our country. The objective was to estimate the global prevalence and by health areas of CKD in the diabetic population of Extremadura. METHODS: Observational, longitudinal retrospective study in the diabetic population attended in the Extremadura Health System in 2012-2014. A total of 90,709 patients ≥18 years old were studied. The estimated glomerular filtration rate (eGFR) was calculated using the Chronic Kidney Disease Epidemiology Collaboration equation (CKD-EPI). The presence of CKD was was defined as follows: an eGFR <60ml/min/1.73m2 in a time period≥of three months or the presence of renal damage, as evaluated by an urine albumin-creatinine ratio (UACR) ≥30mg/g, with or without reduced eGFR, also in a time period ≥ of three months. RESULTS: The overall prevalence of CKD was 15.6% (17.5% in women and 13.7% in men) and it was higher in the province of Cáceres (17.0%) than in Badajoz (14.8%, p<0.001), with the lowest prevalence in the Navalmoral de la Mata health area (13.0%) and the highest in Plasencia (17.8%, p<0.001). The prevalence of CKD defined without the need for confirmation of the sustainability of kidney damage or decreased eGFR was 26.1% (29.3% in women and 22.9% in men), which represents an overestimation of the prevalence of 67%. CONCLUSIONS: The prevalence of CKD in Extremadura's diabetic population is lower than usually referred to and differs significantly between its health areas.